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Java Programming - Math Problem Example

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The current paper "Java Programming" is primarily purposed to give a full Java program on the assignment on Programming. This particular program fully satisfies standards and rules of programming and is also good enough for degree level assignment…
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Java Programming
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Java Programming

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JOptionPane;

public class Calculator extends JFrame implements ActionListener
// Variables
final int MAX_INPUT_LENGTH = 20;
final int INPUT_MODE = 0;
final int RESULT_MODE = 1;
final int ERROR_MODE = 2;
int displayMode;

boolean clearOnNextDigit, percent;
double lastNumber;
String lastOperator;

private JMenu jmenuFile, jmenuEdit, jmenuView, jmenuHelp;
private JMenuItem jmenuitemExit, jmenuitemCopy, jmenuitemPaste, jmenuitemStd,
jmenuitemSci, jmenuitemDigitGrp, jmenuitemAbout;
private JDialog dialog;

private JLabel display;
private JButton button[];
private JPanel masterPanel;
private JTextArea textarea;

Font f12 = new Font("Times New Roman", 0, 12);
Font f121 = new Font("Times New Roman", 1, 12);

jmenuitemSci = new JMenuItem("Scientific");

jmenuitemDigitGrp = new JMenuItem("Digit Grouping");

jmenuHelp = new JMenu("Help");

jmenuitemAbout = new JMenuItem("About Calculator");

JMenuBar mb = new JMenuBar();
// mb.add(jmenuFile);

//Set frame layout manager


//adds menubar to frame (end)

masterPanel = new JPanel();

display = new JLabel("0");

Container contentPane = getContentPane();

// Add components to frame
contentPane.add(display, BorderLayout.NORTH);

button = new JButton[23];

JPanel backSpace = new JPanel();
backSpace.setLayout(new GridLayout(1, 1, 2, 2));

button[20] = new JButton("Backspace");

JPanel control = new JPanel();
control.setLayout(new GridLayout(1, 2, 2 ,2));

button[21] = new JButton(" CE ");
button[22] = new JButton("C");

control.add(button[22]); ... Read More
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